Admin enter notes on users

Allows an admin to add notes to a user from the admin edit component
Notes are sorted, showing the most recent note first.

![notes](https://cloud.githubusercontent.com/assets/3430891/5196024/5c384892-74f4-11e4-8218-c3415b6504df.PNG)

don't send the date, I actually changed the field date in the database to use NOW(), therefore you can remove this from the controller